Retaining original app name after a high replicati

Question

I seem to have 2 separate applications on GAE, the original one with the fictitious name xyz and an hrd one with the name xyz-hrd. I only want one with the name xyz but I want it to use the high resolution datastore. I am trying to use the instructions here.

I am near the end of the HRD migration stage on xyz and have clicked on "Activate Read-only". In step 11 the instructions say the following.

You will be notified when the migration tool is ready to alias the application (by email if you chose that, or by a message when your refresh the browser window). Click Finish Migration to complete the migration. At this point, the new HRD application begins serving incoming requests. 

When I launch xyz at appspot.com, there are no changes.

When I launch xyz-hrd at appspot.com, there are changes, but only new data items.

Do I click on "Finish Migration" or not, and when I do, how will I get all the changes and all of the data items under the application name xyz? I am very nervous about this because the instructions say there is not way to revert after clicking on "Finish Migration".

By the way, in my "dashboard" I can select from among my applications which lists both xyz and xyz-hrd. When I select xyz I (still) see 2 warnings, but no warnings are present when I select xyz-hrd. Below are the 2 warnings.

A version of this application is using the Python 2.5 runtime, which is deprecated!
This application is using the Master/Slave datastore which is deprecated! 

Answer 1

There is no way to reclaim the old app url for the new one. I know, its lame.
To avoid that in the future, map the appspot to a google apps domain so it has a fixed url.
For now, at most you can upload a new version to the old app which redirects to the new one. Before migration you are supposed to stop using the old one by making it readonly. Otherwise changes there wont migrate.